Hydrogen recovery is mainly used for hydrogen annealing, or nitrogen-hydrogen mixture containing hydrogen, the main furnace type has bell-type bright annealing furnace, continuous annealing furnace, zinc with continuous annealing furnace, vertical continuous annealing furnace and so on.

According to the characteristics of the ammonia decomposition gas in the reactor, the main waste gas produced by the reactor is still nitrogen and hydrogen mixture, plus some water, impurities, etc. . After the exhaust gas is recovered by roots blower, it goes into the filter to remove oil, impurity and water, and then passes through the dryer to remove water deeply to obtain dry and pure nitrogen-hydrogen mixture.